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Vulnerability record · CVE-2010-0166 · published 25 March 2010

CVE-2010-0166: Mozilla firefox memory buffer overflow vulnerability

Mozilla · Firefox

The gfxTextRun::SanitizeGlyphRuns function in gfx/thebes/src/gfxFont.cpp in the browser engine in Mozilla Firefox 3.6 before 3.6.2 on Mac OS X, when the Core Text API is used, does not properly perform certain deletions, which allows remote attackers to cause a denial of service (memory corruption and application crash) and possibly execute arbitrary code via an HTML document containing invisible Unicode characters, as demonstrated by the U+FEFF, U+FFF9, U+FFFA, and U+FFFB characters.

5.1 CVSS 2.0 Medium EPSS 6.8% · top 6.3% CWE-119 · Memory buffer overflow
5.1CVSS 2.0 base score
6.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

The gfxTextRun::SanitizeGlyphRuns function in gfx/thebes/src/gfxFont.cpp in the browser engine in Mozilla Firefox 3.6 before 3.6.2 on Mac OS X, when the Core Text API is used, does not properly perform certain deletions, which allows remote attackers to cause a denial of service (memory corruption and application crash) and possibly execute arbitrary code via an HTML document containing invisible Unicode characters, as demonstrated by the U+FEFF, U+FFF9, U+FFFA, and U+FFFB characters.

AV:N/AC:H/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.mozilla.org/security/announce/2010/mfsa2010-11.html Vendor Advisory
http://www.securityfocus.com/bid/38918
http://www.securityfocus.com/bid/38943
http://www.vupen.com/english/advisories/2010/0692
https://bugzilla.mozilla.org/show_bug.cgi?id=538065
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14182
http://www.mozilla.org/security/announce/2010/mfsa2010-11.html Vendor Advisory
http://www.securityfocus.com/bid/38918
http://www.securityfocus.com/bid/38943
http://www.vupen.com/english/advisories/2010/0692
https://bugzilla.mozilla.org/show_bug.cgi?id=538065
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14182

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Source: NIST National Vulnerability Database (record CVE-2010-0166), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.